JP2006038157A - Member fitting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting structure of a qualitatively satisfactory member, superior in fitting workability of mutual members. <P>SOLUTION: This member fitting structure has a lower case 1 (a first member) having an engaging projection 4 and a groove part 6 formed by arranging a pressing-down piece 5 on both sides of this engaging projection 4, and an upper case 7 (a second member) having a locking piece 9 for forming a locking part 11 by arranging a hole 10; and fits the lower case 1 and the upper case 7 by locking the locking part 11 on the engaging projection 4 by inserting the locking piece 9 into the groove part 6. A cut line 12 is arranged in the locking part 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a member engaging structure in which an engaging protrusion provided on one member is engaged with an engaging piece provided on the other member, thereby engaging both members.

Conventionally, as this type of engagement structure, for example, the one described in Patent Document 1 below is known. The coupling device (engagement structure) described in Patent Document 1 is for engaging the bracket 1 and the connector 5, and the connector 5 as a mounted body includes a pair of left and right guides 3 having an L-shaped cross section, A protrusion 11 as a locking portion is provided on the surface of the connector 5 between the guides 3. On the other hand, the insertion part 9 of the bracket 1 as an attachment body is provided with an engagement hole 13 as an engagement part. Then, by inserting the insertion portion 9 between the guides 3 of the connector 5, the protrusion 11 is engaged with the engagement hole 13, and the bracket 1 is engaged with the connector 5.
Japanese Utility Model Publication No. 4-13685

  However, in the coupling device disclosed in Patent Document 1, when the insertion portion 9 of the bracket 1 is inserted between the guides 3 of the connector 5, the distal end side of the insertion portion 9 rides on the protrusion 11 and tends to be pushed upward. . However, since both sides of the insertion portion 9 are pressed by the guide 3, the insertion portion 9 comes to bend around the place on the protrusion 11. In this state, the insertion portion 9 is further inserted, but the insertion portion 9 is difficult to bend and the frictional resistance is large, and the insertion workability is poor.

  Further, when the bracket 1 is formed by injection molding, generally, a weld line that is a joint of resin is easily generated between the engagement hole 13 of the insertion portion 9 and the front end edge. Then, when the insertion portion 9 is inserted between the guides 3, the vicinity of the weld line is curved, and there is a possibility that a crack or a crack may occur in the weld line portion. Then, generation of burrs and dust is expected, and we are worried that it will not adversely affect the quality.

  The present invention has been made in view of such a point, and an object of the present invention is to provide an engaging structure of a member having satisfactory engaging workability between members and satisfying quality.

  In order to achieve the above-mentioned object, the present invention provides a first member having an engaging protrusion and a groove formed by providing a holding piece on both sides of the engaging protrusion, and a locking portion provided by providing a hole. A second member having a formed locking piece, and the locking portion is locked to the engaging protrusion by inserting the locking piece into the groove, and the first member and the In the engaging structure of the member that is engaged with the second member, a cut is provided in the locking portion.

  In addition, a first member having an engagement protrusion and a groove formed by providing a holding piece on one side of the engagement protrusion, and a lock having a lock formed by providing a notch A second member having a piece, and the engagement portion is engaged with the engagement protrusion by inserting the engagement piece into the groove, and the first member and the second member Is to be attached.

  A first member having an engaging protrusion; a second member having a locking piece in which a locking portion is formed by providing a hole; and the first member corresponding to both end portions of the locking piece. A third member having a wall portion arranged with a predetermined gap, and the locking portion is locked to the engaging protrusion by inserting the locking piece into the gap, In the engagement structure of the member in which the first member and the second member are engaged, a cut is provided in the locking portion.

  It is possible to obtain a member engagement structure that has good engagement workability between members and is satisfactory in quality.

  In the present invention, the first member is a lower case, the second member is an upper case, and the third member is a cover. 1 to 5 show a first embodiment of the present invention. FIG. 1 is a perspective view of a main part before the lower case and the upper case are attached, and FIG. 2 is a front view of the main part after the attachment. . FIG. 3 is a cross-sectional view showing the engagement process, and FIG. 4 is a back view (indicated by an arrow X in FIG. 2) showing the engagement process as seen from the back side of the lower case. FIG. 5 is a cross-sectional view of a main part after engagement (cross section AA in FIG. 2).

  On the side wall 2 of the lower case 1 made of synthetic resin whose front surface is opened, an engagement protrusion 4 having an inclined surface 3 and a holding piece 5 having an L-shaped cross section are provided on both sides of the engagement protrusion 4. Then, by providing the holding piece 5, two groove portions 6 are formed between the holding piece 5 and the side wall 2.

  The upper case 7 made of synthetic resin covers the front opening side of the lower case 1, and a tongue-like elastically deformable locking piece 9 is provided on the peripheral wall 8. The locking piece 9 is inserted into the groove 6 of the lower case 1, and a square hole 10 that is slightly larger than the engaging protrusion 4 is provided at a position corresponding to the engaging protrusion 4. A tip side portion (between the hole 10 and the tip) of the locking piece 9 formed by providing the hole 10 is defined as a locking portion 11. And the cut | interruption 12 is provided in the approximate center of the latching | locking part 11. FIG. Therefore, by providing the cut 12, the locking portion 11 is divided.

  A method for engaging the lower case 1 and the upper case 7 will be described. As described above, the front end side of the locking piece 9 of the upper case 7 is inserted into the groove 6 of the lower case 1. Then, the tip of the locking portion 11 comes into contact with the inclined surface 3 of the engaging protrusion 4. When the upper case 7 is further pushed downward in this state, the engaging portion 11 rides on the engaging protrusion 4 and is inserted while being bent outward (see FIGS. 3 and 4). Then, when the locking portion 11 is disengaged from the top side 13 of the engaging projection 4, the locking portion 11 returns to its original state and is locked to the locking surface 14 of the engaging projection 4, so that the upper case 7 is fixed to the lower case 1. (See FIGS. 2 and 5). In addition, since the locking piece 9 is an elastic piece, the locking part 11 does not break during the insertion process.

  In this way, since the cut portion 12 is provided in the locking portion 11 of the locking piece 9, the locking portion 11 is easily bent even if both ends of the locking piece 9 are prevented from being lifted by the holding piece 5, Therefore, the engagement workability between the lower case 1 and the upper case 7 is improved. In addition, since the cut line 12 is provided at a location where a normal weld line is likely to occur, that is, approximately at the center of the locking portion 11, there is no weld line. Therefore, unlike the conventional example, burrs and dust are not generated.

  In addition, after the upper case 7 is engaged with the lower case 1, the holding piece 5 is in a direction in which stress is applied to the upper case 7 and the lower case 1 or the engagement between the engagement portion 11 and the engagement protrusion 4 is released. In order to prevent the locking piece 9 from moving away from the side wall 2 and the locking part 11 from being easily detached from the engaging projection 4 when the force is applied to the locking part 11, both ends of the locking piece 9 are It is provided to suppress. However, since the locking piece 9 is inserted into the groove portion 6 formed by providing the holding piece 5, the width of the groove portion 9 is slightly wider than the plate thickness of the locking piece 9.

  FIG. 6 is a front view of a main part after the lower case and the upper case are engaged with each other according to the second embodiment of the present invention. This embodiment is different from the first embodiment except that the engagement protrusion provided on the lower case is different from the holding piece, and the other parts are the same as those in the first embodiment. Detailed description thereof will be omitted.

  On the side wall of the lower case 1, there are provided an engaging protrusion 4 having an inclined surface, and holding pieces 5 having an L-shaped cross section on both sides of the engaging protrusion 4. Two engagement protrusions 4 in the present embodiment are provided corresponding to each of the divided locking portions 11 (a state in which the engagement protrusions 4 in the first embodiment are divided into two). Accordingly, one locking portion 11 is locked to one engaging projection 4 and the other locking portion 11 is locked to the other engaging projection 4. Further, as shown in FIG. 6, the holding piece 5 is positioned at a position where the lower end of the holding piece 9 (locking portion 11) after being locked to the engaging protrusion 4 does not protrude from the lower end of the holding piece 5. It is provided.

  The method of engaging the lower case 1 and the upper case 7 in this embodiment is performed in the same manner as in the first embodiment, and the same effects as in the first embodiment are obtained in this embodiment. can get. Furthermore, since the engagement protrusions 4 are separated, the width of each engagement protrusion 4 is reduced and the thickness portion is reduced. Therefore, when the lower case 1 is formed by injection molding, the engagement protrusions 4 are distorted. The engagement state between the engagement protrusion 4 and the locking portion 11 is also good. In addition, since the lower end of the locking piece 9 does not protrude beyond the lower end of the holding piece 5, the locking portion 11 is more difficult to come off from the engaging protrusion 4. Of course, the same positional relationship as in the first embodiment (a state in which the lower end side of the locking piece 9 protrudes from the lower end of the holding piece 5) may be used, and the first embodiment is set in the same manner as the present embodiment. May be.

  FIG. 7 is a front view of a main part after the lower case and the upper case are engaged with each other according to the third embodiment of the present invention. The present embodiment is different from the first embodiment except that the holding piece provided on the lower case and the upper case are different, and the other parts are the same as those of the first embodiment. The detailed description is omitted.

  On the side wall of the lower case 1, there are provided an engaging protrusion 4 having an inclined surface, and a holding piece 5 having an L-shaped cross section on one side of the engaging protrusion 4. Then, by providing the holding piece 5, a groove is formed between the holding piece 5 and the side wall (not shown, but the same as the first embodiment). The locking piece 9 of the upper case 7 is provided with a notch 15 that is slightly larger than the engaging protrusion 4 at a position corresponding to the engaging protrusion 4. A front end side portion (between the notch 15 and the front end) of the locking piece 9 formed by providing the cutout 15 is defined as a locking portion 11.

  Next, a method for engaging the lower case 1 and the upper case 7 will be described. Basically, it is the same as the first embodiment. When the distal end side of the locking piece 9 is inserted into the groove portion of the lower case 1, the distal end of the locking portion 11 comes into contact with the inclined surface of the engagement protrusion 4. When the upper case 7 is further pushed downward in this state, the locking portion 11 is inserted while being bent outward. Then, when the locking portion 11 is disengaged from the engaging protrusion 4, the locking portion 11 returns to its original state, and is locked to the locking surface of the engaging protrusion 4 so that the upper case 7 is engaged with the lower case 1. .

  As described above, also in this embodiment, the same effect as that of the first embodiment can be obtained. Furthermore, since the holding piece 5 is only on one side of the engaging protrusion 4, the engaging portion can be simply and miniaturized.

  8 and 9 show a fourth embodiment of the present invention. FIG. 8 is a perspective view of the main part before the lower case, the upper case and the cover are attached, and FIG. 9 is a cross-sectional view of the main part after the attachment. It is. In addition, the same code | symbol is attached | subjected about the same or equivalent part as each said embodiment, and the detailed description is abbreviate | omitted.

  An engaging protrusion 4 having an inclined surface 3 is provided on the side wall 2 of the synthetic resin lower case 1 whose front surface is opened. The upper case 7 made of synthetic resin covers the front opening side of the lower case 1, and a tongue-like elastically deformable locking piece 9 is provided inside the peripheral wall 8. The engaging piece 9 is engaged with the engaging protrusion 4 of the lower case 1, and a square hole 10 that is slightly larger than the engaging protrusion 4 is provided at a position corresponding to the engaging protrusion 4. A tip side portion (between the hole 10 and the tip) of the locking piece 9 formed by providing the hole 10 is defined as a locking portion 11. And the cut | interruption 12 is provided in the approximate center of the latching | locking part 11. FIG. Therefore, by providing the cut 12, the locking portion 11 is divided.

  The cover 16 covers the periphery of the lower case 1, and two wall portions 17 are provided inside the side wall 2A. The wall portion 17 is provided so as to correspond to both end portions of the locking piece 9, and after covering (assembling) the periphery of the lower case 1 with the cover 16, the wall portion 17 and the predetermined gap S are separated from the side wall 2 of the lower case 1. Is set to occur. That is, the wall portion 17 corresponds to the holding piece 5 in each of the above embodiments, and the size of the gap S is slightly larger than the thickness of the locking piece 9.

  Next, a method for engaging the lower case 1 and the upper case 7 will be described. The lower case 1 and the cover 16 are assembled in advance. In this state, the distal end side of the locking piece 9 of the upper case 7 is inserted into the gap S. Then, the tip of the locking portion 11 comes into contact with the inclined surface 3 of the engaging protrusion 4. When the upper case 7 is further pushed downward in this state, the locking portion 11 is inserted while being bent outward. Then, when the locking portion 11 is disengaged from the engaging protrusion 4, the locking portion 11 returns to its original state, and is locked to the locking surface of the engaging protrusion 4 so that the upper case 7 is engaged with the lower case 1. .

  In this manner, since the cut 12 is provided in the locking portion 11 of the locking piece 9, the locking portion 11 can be provided even if both ends of the locking piece 9 are not lifted by the wall portions 17 provided on the cover 16. Therefore, it is possible to obtain the same effects as those of the first embodiment, such that the engagement workability between the lower case 1 and the upper case 7 is improved.

The principal part perspective view before engagement of the lower case and upper case which shows 1st Embodiment of this invention. The principal part front view after the same attachment. Sectional drawing which shows the same attachment process. The back view which shows the same attachment process (X arrow view in FIG. 2). Sectional drawing of the principal part after the attachment (AA cross section in FIG. 2). The principal part front view after engagement of the lower case and upper case which show 2nd Embodiment of this invention. The principal part front view after engagement of the lower case and upper case which show 3rd Embodiment of this invention. The principal part perspective view before engagement of the lower case, upper case, and cover which shows 4th Embodiment of this invention. The principal part sectional drawing after the attachment.

Explanation of symbols

1 Lower case (first member)
4 Engaging projection 5 Holding piece 6 Groove 7 Upper case (second member)
9 Locking piece 10 Hole 11 Locking portion 12 Cut 15 Notch 16 Cover (third member)
17 Wall

Claims (3)

  A first member having an engaging protrusion and a groove formed by providing a holding piece on both sides of the engaging protrusion, and a second member having an engaging piece having a locking portion formed by providing a hole. The locking portion is locked to the engaging protrusion by inserting the locking piece into the groove portion, and the first member and the second member are engaged with each other. In the above-described member engaging structure, the member engaging structure is characterized in that a cut is provided in the locking portion.   A first member having an engaging protrusion and a groove formed by providing a holding piece on one side of the engaging protrusion, and a locking piece having a locking part formed by providing a notch A second member, and the locking portion is locked to the engaging protrusion by inserting the locking piece into the groove, and the first member and the second member are engaged with each other. A structure for fastening members to be worn.   A first member having an engaging projection; a second member having a locking piece in which a locking portion is formed by providing a hole; and the first member corresponding to both end portions of the locking piece; A third member having a wall portion arranged with a predetermined gap, and the locking portion is locked to the engaging protrusion by inserting the locking piece into the gap, and the first member An engagement structure of members, wherein the first member and the second member are engaged with each other, wherein a cut is provided in the locking portion.

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